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I don’t think the SPF / DKIM / DMARC stuff is overly complex nor the core of the problem.
It’s not the core of the issue, but the average joe that is a hobbyist self-hoster it will be.
IMO, the core issue is that there is no standard whatsoever. People just do whatever the hell they want with these records, pretty much. Microsoft and Google do it differently than each other, even.
The only solution for me is that we move on from email as a society.
Excellent, I hadn’t come across this yet, many thanks!
Just fyi, you typed the link to their main source code as github.org instead of .com :)